<template>
    
    <div class="headerApp">
        <!--这是头部-->
        <mt-header fixed title="vue项目">
            <span slot="left">
                <mt-button icon="back" @click="goBack" v-show="flag">返回</mt-button>
            </span>
        </mt-header> 

        <!--对应的组件内容渲染到router-view中-->
        <transition>
            <router-view></router-view>
        </transition>
        

        <!--这是导航-->
        <nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-nav" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-nav" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-nav" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart">
					<span class="mui-badge" id="car_num">{{ $store.getters.getShopAll }}</span>
				</span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-nav" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>

    </div>

</template>

<script>
    export default {
        data() {
            return {
                flag: false,
            }
        },

        created(){
            if(this.$route.path === '/home'){
                this.flag = false;
            }else{
                this.flag = true;
            }     
        },
        methods:{
            goBack:function(){
                this.$router.go(-1);
            }
        },
        watch:{
            '$route.path':function(newVal){
                if(newVal === '/home'){
                    this.flag = false;
                }else{
                    this.flag = true;
                }
            }
        }
    }

</script>

<style lang="less">
    *{
        margin: 0;
        padding:0;
    }
    body{
        padding-top:40px; 
        padding-bottom: 50px;
        background: #fff;
        overflow-x: hidden;
        
    }
    .headerApp::-webkit-scrollbar {
        width: 0;
        height: 0;
    }

    .headerApp{
        width: 100%;
        height: 100%;
        overflow-y: auto;
        .mint-header{
            background-color: #26a2ff;
            text-align: center;
            z-index: 20;
        }
    }

    h1{
        font-size:18px !important;
        color: #fff;
        margin: 0;
        padding: 14px 0
    }

    .mui-bar-tab{
        background-color: #eee;
        box-shadow: 0 0 0 0;
        -webkit-box-shadow: 0 0 0 0; 
        .mui-tab-item-nav {
            display: table-cell;
            overflow: hidden;
            width: 1%;
            height: 50px;
            text-align: center;
            vertical-align: middle;
            white-space: nowrap;
            text-overflow: ellipsis;
            color: #929292;
            .mui-icon {
                top: 3px;
                width: 24px;
                height: 24px;
                padding-top: 0;
                padding-bottom: 0;
            }

            .mui-icon~.mui-tab-label {
                font-size: 11px;
                display: block;
                overflow: hidden;
                text-overflow: ellipsis;
                padding-top: 2px;
            }
        } 
        .mui-active{       
            color: #007aff !important;
        }   
    }
    
    //动画效果
    .v-enter{
        opacity: 0;
        transform: translateX(100%);
        -webkit-transform: translateX(100%);
    }
    .v-leave-to {
        opacity: 0;
        transform: translateX(-100%);
        -webkit-transform: translateX(-100%);
        position: absolute;
    }

    .v-enter-active,
    .v-leave-active{
        transition: all 0.4s ease-in-out;
        -webkit-transition: all 0.4s ease-in-out;
    }
</style>
